Table 2 Distribution of key covariates among 157 boys and 176 girls
From: Fluoride exposure and pubertal development in children living in Mexico City
Variables | Min | 10% | 25% | 50% | 75% | 90% | Max | p-valuea | |
|---|---|---|---|---|---|---|---|---|---|
Child’s age (years) | Boys | 10.7 | 11.5 | 12.2 | 13.4 | 15.8 | 17.2 | 17.7 | 0.70 |
Girls | 10.8 | 11.4 | 12.0 | 13.5 | 15.8 | 16.8 | 17.8 | ||
BMI-for-age z-score | Boys | −3.8 | −1.6 | −0.6 | 0.5 | 1.6 | 2.3 | 3.5 | 0.22 |
Girls | −2.9 | −0.9 | −0.3 | 0.5 | 1.5 | 2.2 | 3.3 | ||
Maternal education (years) | Boys | 6.0 | 9.0 | 9.0 | 12.0 | 12.0 | 16.0 | 20.0 | 0.43 |
Girls | 2.0 | 7.0 | 9.0 | 11.0 | 12.0 | 16.0 | 21.0 | ||
Number of siblings at birth | Boys | 1.0 | 1.0 | 1.0 | 2.0 | 3.0 | 3.0 | 6.0 | 0.49 |
Girls | 0.0 | 1.0 | 1.0 | 2.0 | 3.0 | 3.0 | 5.0 | ||
Urinary fluoride (mg/L)b | Boys | 0.15 | 0.38 | 0.48 | 0.63 | 0.77 | 0.97 | 3.01 | 0.64 |
Girls | 0.05 | 0.34 | 0.43 | 0.57 | 0.75 | 1.09 | 2.61 | ||
Boys | Girls | 0.39 | |||||||
Marital status | N | % | N | % | |||||
Married | 119 | 75.8% | 126 | 71.6% | |||||
Not married | 38 | 24.2% | 50 | 28.4% |